Our kit will sell for about $260 to $280 which is more than a posi-lock, but you will have the peace of mind knowing your four wheel drive is significantly more reliable.
You aren't addressing the weak point, the housing. This kit might add "peace of mind" but that won't help you when it breaks.
Our company believes that the IFS has a lot to offer that the solid axle swapped trucks do not. A few advantages are significantly better high speed handling and a superior ride quality. I can verify this having owned both a solid front axle Chevy, and a Chevy with IFS. Our company mission is to offer products to consumers who also recognize the IFS advantage that will make the IFS just as strong and reliable as a Solid Axle.
I've owned both as well and a solid axle truck is perfectly fine for high speed driving. It is far, far superior to IFS when towing in slick conditions as well. You can't make an IFS as strong or reliable as even a stock solid axle. Much less a lightly modified one.
So for those of us who elect to keep the IFS and actually wheel it hard, this product will greatly enhance the reliability of our rigs. Strengthening the front end will also be a huge advantage especially since the Duramax swap into the GMT 400s is becoming more and more common.
Wheeling hard with IFS isn't an option. Not because the shafts or side collars are going to break but because the housing can't handle it.
To date there still aren't any lockers readily available for the IFS so that is one more huge deficit of trying to wheel with them. The reason they don't offer lockers is because the housings can barely stand up to an open diff. A locker would rip them apart in no time.
I'll volunteer one of my solid axle vehicles for a comparison test. We can do a pull, in reverse, on asphalt. My front tow hooks to yours. If my truck breaks and yours doesn't, I'll start believing. I've got an extra axle here, I'm not too worried about breaking one.